Hawkins 2020 Exam I MULTIPLE CHOICE. Choose the one alterna tive that best compl

Question

Hawkins 2020 Exam I MULTIPLE CHOICE. Choose the one alterna tive that best completes the statement or answers the question. Find the percentile for the data value. 1) Data set: 12 18 42 24 12 30 54 54 66 18 18 54 36 6 54; data value: 42 1) A) 60 B) 52 0) 70 D) 35 Find the mean of the data summarized in the given frequency distribution. 2) The test scores of 40 students are summarized in the f requency distribution below. Find the mean 2) Score | Students 60-6915 70-79 80-89 90-99 A) 74.5 standard deviation for the given sample data. Round your answer to one more decimal place than is present i specific model. The prices he was quoted are listed below: B) 66.6 C) 70.3 D) 74.0 Find the the original data. 3) To get the best deal on a CD player, Tom called eight appliance stores and asked the cost of a 3) 5356 $169 $293 $267 $386 $288 s318 $275 A) S330.5 B) $721,124.0 C) $691,488.0 D) $65.1 4) 18 18 189 15 5 10 5 15 A) 1.6 B) 5.8 C)5.4 D) 5.1 Solve the problem. 5) A student eaned grades of 84, 78, 84, and 72 on her four regular tests. She earned a grade of 78 on 5) the final exam and 86 on her class projects. Her combined homework grade was 87. The four regular tests count for 40% of the final grade, the final exam counts for 30%, the project counts for 10%, and homework counts for 20%. What is her weighted mean grade? Round to one decimal place. A) 81.3 B) 82.1 C) 80.2 D) 81.2 Find the median for the given sample data. 6) A store manager kept t track of the number of newspapers sold each week over a seven-week 6) period. The results are shown below 81 71 202 113 269 248 242 Find the median number of newspapers sold. A) 113 newspapers C) 202 newspapers B) 175 newspapers D) 242 newspapers

Explanation / Answer

1) Percentile = 60 (option A)
Arrange the given numbers in ascending order. 42 lies on 10 rank, percentile = 10/15*100

2)

mean = 2960/40 = 74 (Option D)

3.

From the given data, mean is calculated mean = 294 (xbar)

std. dev. = sqrt(29636/7) = 65.067 (Option D)

4.

Mean (xbar) = 13

std. dev. = sqrt(236/8) = 5.43 (Option C)

Midpoints (x) students (f) x*f 54.5 5 272.5 64.5 15 967.5 74.5 6 447 84.5 5 422.5 94.5 9 850.5 40 2960

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